| 100% | SONORA | 6 | State bordered by the Colorado River |
| 64% | GRANDCANYON | 11 | Gorge carved by the Colorado River |
| 61% | AUSTIN | 6 | State capital on the Colorado River |
| 58% | ORE | 3 | State bordered by Washington on the north: Abbr. |
| 58% | HADES | 5 | Realm bordered by the river Styx |
| 57% | GRAND | 5 | Deep gorge formed by the Colorado River in northern Arizona, US |
| 57% | SDAK | 4 | State divided by the Missouri River: Abbr. |
| 57% | GRAND | 5 | & 17A Deep gorge formed by the Colorado River in northern Arizona, US |
| 56% | IOWA | 4 | State whose eastern border is formed by the Mississippi River |
| 54% | CANYON | 6 | Grand ___, natural wonder carved by the Colorado River about 5 to 6 million years ago |
| 51% | OHIO | 4 | River forming the borders of parts of five states |
| 50% | TENN | 4 | State trisected by a river of the same name: Abbr. |
| 49% | YUMA | 4 | Arizona border town on the Colorado River |
| 48% | YUMA | 4 | Arizona city on the Colorado river |
| 48% | MOHAVE | 6 | People indigenous to the Colorado River |
| 48% | OAXACA | 6 | State bordered by Chiapas |
| 47% | ORE | 3 | State whose northern border is the Columbia River (Abbr.) |
| 47% | IOWA | 4 | Only state whose west and east borders are formed entirely by rivers |
| 46% | IOWA | 4 | State bordered by Minnesota and Missouri |
| 46% | VERACRUZ | 8 | State bordered by Oaxaca and Tabasco |
| 46% | DAM | 3 | Hoover ___ (structure on the Colorado River) |
| 46% | ALA | 3 | State bordered by Mississippi and Georgia: Abbr. |
| 46% | WISCONSIN | 9 | State bordered by Minnesota, Illinois and Iowa |
| 46% | KENTUCKY | 8 | State bordered by Tennessee, Ohio and Indiana |
| 46% | LAOS | 4 | Land bordered by the Mekong |
| 46% | ANGOLA | 6 | Land bordered by the Congo |
| 45% | YUMA | 4 | City on the Colorado River |
| 45% | HOOVERDAM | 9 | Construction on the Colorado River |
| 45% | MEAD | 4 | Lake on the Colorado River |